Bobbin for the shuttles of sewing machines



(No Model.)

- W. KOCH.

BOBBIN FOR THE SHUTTLES OF SEWING MACHINES. No. 308,078. Patented Nov.18, 1.884.

WITNESSES INVBNTOR ATTORNEY N PETERS, Puma-Lithographer. Walhillgion. D.C.

sure Sterne PATENT @rrrcn.

WILLIAM KOCH, OF NEIV YORK, N. Y.

BOBBIN FOR THE SHUTTLES OF SEW'INGMACHINES.

SPECIFICATION forming part of Letters Patent No. 308,078, dated November18, 1884. Application filed January 30, 1884. (No model.)

To aZZ whom z t may concern.-

Be it known that I, WILLIAMKooH, of the city, county, and State of NewYork, have invented a new and useful Improvement in Bobi bins for theShuttles of Sewing-Machines; and I declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying sheet of drawings, forming part of this specification.

This invention is in the nature of an improvement in sheet-metal bobbinsfor the shuttles of sewing-machines; and the invention consists in ashuttle-bobbin struck up from sheetmetal, as is more particularlydescribed, shown, and claimed hereinafter.

In the accompanying sheet of drawings, Figure 1 represents alongitudinal section of my bobbin. Fig. 2 is a side view of bobbin. Fig.3 is a cross-section through 00 m, Fig. 2.

Similar letters of reference indicate like parts in the several figures.

Bobbins for the shuttles of sewing-machines have been made from woodturned to suitable size and shape to render them light and of smallcost; but when they are made of wood they often warp out of shape, sothat they will not turn truly and freely in soon wear out and have to bediscarded for new ones, and upon attempting to rewind them in a machineused for that purpose their centers are frequently found so much out ofline as to render the rewinding impossible. To produce a light and cheapbobbin and at the same time remedy these defects existing in the woodenbobbin, I construct my bobbin from sheet metal, preferably brass, struckup by suitable dies into two or morelongitudinal sections, A, eachsection having the exact form. and dimension that will constitute alongitudinal half or a quarter of the entire bobbin, or both head andstem. The sections,whether for half or quarter of the bobbin, havingbeen struck up from thin sheet metal, 'as stated, are then placedtogether in proper relation to each other, and at the points or apices athey are soldered together and in position. It is not necessary to applysolder for this purpose to any other part of the bobbin or its sections.Through the stem 1) of the bobbin, midway between its ends, is formed anorifice, c, and in each head (Z are in like manner formed orifices 0.Now when my bobbin is constructed subthe shuttle, they keeps the thread.

from unwinding on the bobbin until it is placed within the shuttle.WVhen the end is withdrawn from the edges of the sections and theorifice e,the bobbin is centered in the shuttle by its points or centersa, and is then employed the same as any other bobbin'in like position.lVhen the bobbin has become emptied or its thread been used, it isremoved from the shuttle, placed in the rewinding-machine, in whichmachine it is centered by its points a, and caused to revolve on thesecenters, and in revolving winds upon itself the thread, which issupplied by the operator.

It will be seen by the foregoing construction and operation of mybobbin, that since it is made of thin sheet metal struck up in dies, itsinterior is hollow and the bobbin is therefore as light or lighter thanone made of wood, and being made of metal it will not warp out of orfrom its original shape. Its centers a will therefore at all timesmaintain their true axial position, and since these centers are of metalthey will revolve for an indefinite time without appreciable wear withinthe shuttle, and since these centers do not become worn and the shuttlenot warped out of shape the same bobbin can be rewound and used over andover again with results quite as satisfactory asif the bobbin wereentirely new in each instance. The cost of the bobbin is but very littleor no more than the cost of the wooden bobbin; but by reason of thepractical inde struotible material of which it is made, its longer liferenders it in the enc'very much cheaper than the wooden bobbin.

Instead of making the orifice a through the stem of the bobbin, a smallslit or tongue may be formed 011 the stem forthe purpose of catching thethread when it is wound thereon; or the orifice and slit may be omitted,if desired. Having now described my invention,what I claim as new, andPatent, is-

desire to secure by Letters.

1. A bobbin for sewing-machine shuttles, 8. A bobbin for sewing-machineshuttles, composed of two or more longitudinal sections composed of twoor more longitudinal sections of sheet metal united, substantially asdeof sheet metal united at their points or centers scribed, each sectionforming a part 0E both by solder, substantially as set forth. the headand stem, as set forth.

2. A bobbin for sewing-machine shuttles, WILLIAM KOCH. composed of twoor more united longitudinal sections of sheet metal and having orifices0 WVitnesses:

and e, substantially as and for the purpose set G. M. PLYMPTON, 1oforth. EDWARD L. J onNs.

